Comparison

Concrete Engineering vs SN Requerido

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Concrete Engineering

This app provides a comprehensive suite of calculators for concrete and civil engineering parameters. It features smart auto-fill options, a detailed calculation history with PDF export, and direct references to ACI codes. Unlock all 56 calculators with a one-time purchase.

Highlights
  • 56 concrete and civil engineering calculators
  • Metric and Imperial unit support
  • Detailed formulas for all calculations
  • Smart auto-fill pickers
  • Calculation history with PDF export
  • ACI 318-19 code references
Features
Read full description

Concrete Engineering Calculator is a user-friendly app with 56 calculators for concrete and civil engineering parameters. This version introduces smart auto-fill pickers, a full calculation history with PDF export, and ACI code references on every calculator. Key Features: 56 calculators covering beams, columns, slabs, walls, and more Supports both Metric (SI) and Imperial (USCS) units Includes detailed formulas for all calculations Smart auto-fill pickers for concrete mix grades, rebar grades, and bar sizes Calculation history with save, review, and PDF export ACI 318-19 code reference badge on every calculator 6 calculators free forever, 56 total — unlock all with a one-time purchase, no subscription Beam Calculations: Water/Cementitious Materials Ratio Modulus of Elasticity Tensile Strength Compressive Stress (Beam) Stress in Reinforcement Cross-sectional Area (Tensile and Compressive Reinforcement) Stress (Extreme Fiber of Concrete) Shear and Diagonal Tension Nominal Shear Stress Ultimate Shear Capacity Cracking Moment Bending Moment Capacity (Underreinforced and Rectangular Beams) Column Calculations: Total Allowable Axial Load Spiral Reinforcing Ratio Long-Column Load Reduction Factor (Fixed Ends) Maximum Permissible Eccentricity (Spiral and Tied Columns) Bending Load (Spiral and Tied Columns) Slab and Wall Calculations: Slab Thickness Flexural Stiffness Ratio (Beam Section and Slab Width) Axial Capacity of Wall Nominal Shear Stress on Wall Vertical Shear Reinforcement Ratio of Wall Development Lengths and Crack Control: Tension Development Lengths (Various Bar Types) Compression Development Length Development Length (Hooked Bar) Crack Width Control Additional Calculations: Volume of Spiral Steel to Concrete Core Ratio Moment at Balanced Condition Shear Friction Reinforcement Area Coefficient of Sliding Friction Modular Ratio Steel Ratio Effective Moment of Inertia Total End Shear (Counterfort Walls) Ultimate Strength (No Wind, With Wind, With Earthquake Load) Auto-Fill Reference Pickers: Concrete mix picker fills compressive strength and modulus of elasticity automatically Rebar grade picker fills yield strength and modulus of steel automatically Bar size picker fills cross-sectional area and diameter automatically All pickers support both SI and USCS unit modes

About

SN Requerido

Features
Read full description

Aplicación móvil para el cálculo directo del Número Estructural (SN) según el Método AASHTO 1993. Incluye opciones para el cálculo del tráfico que atendería un pavimento con un Número Estructural conocido.

Screenshots

Concrete Engineering4 screens
SN Requerido4 screens

Verdict

The call

The clearest difference is in-app purchases: SN Requerido at none against Concrete Engineering's 1. SN Requerido also leads on update cadence (every 4 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Concrete Engineering sells 1 one-off in-app purchase. SN Requerido asks for nothing beyond the download.

UpkeepUpdate frequency

Concrete Engineering ships an update every 7 months, SN Requerido every 4 weeks. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

Scorecard2 real differences · 8 level
Concrete Engineering versus SN Requerido: the parameters behind the verdict, then further details
ParameterConcrete EngineeringSN Requerido
PriceFreeFree
Rating4.7 (7 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 7 monthsEvery 4 weeks — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.617.6 — better
Further details — not scored
Size8 MB14 MB
Age rating4+4+
DeveloperV PUGAZHENTHIJuan Javier Baba Toyofuko

In-app purchases

1 purchases

Concrete Engineering

One-time1
  • Concrete Engineering Calc.$3.99
None

SN Requerido

No in-app purchases

Questions

Is Concrete Engineering free?
Concrete Engineering is free to download, with in-app purchases available.
Is SN Requerido free?
SN Requerido is free to download, with no in-app purchases.
Do Concrete Engineering or SN Requerido have ads?
Both Concrete Engineering and SN Requerido show ads.
Which is updated more often, Concrete Engineering or SN Requerido?
Concrete Engineering ships an update every 7 months, and SN Requerido every 4 weeks. Most recently, Concrete Engineering was updated on September 18, 2026 and SN Requerido on September 19, 2026.

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